Effects of nano-kaolinite clay on the freeze–thaw resistance of concrete

Fan, Ying-Fang; Zhang, Shiyi; Wang, Qi; Shah, Surendra P.

doi:10.1016/j.cemconcomp.2015.05.001

Cited by 84 publications

(24 citation statements)

References 38 publications

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“…Damage due to the freeze–thaw cycles is one of the major deterioration pathways of concrete in cold climates [40]. There are several main theories that are being widely accepted for explaining the freeze–thaw damage of cement composites, including the hydraulic pressure theory, crystallization pressure theory, and osmotic pressure theory [41]. Generally, the frost damage of CBMS results from the pressure induced by the volume increase associated with water turning from liquid phase to solid phase and by the water migration in the capillary pores [42].…”

Section: Nanotechnology For Cbms To Overcome Physical Deteriorationsmentioning

confidence: 99%

Nanotechnology in Cement-Based Materials: A Review of Durability, Modeling, and Advanced Characterization

AlShareedah

et al. 2019

Nanomaterials

110

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In the context of increasing applications of various nanomaterials in construction, this work reviews the renewed knowledge of nanotechnology in cement-based materials, focusing on the relevant papers published over the last decade. The addition of nanomaterials in cement-based materials, associated with their dispersion in cement composites, is explored to evaluate their effects on the resistance of cement-based materials to physical deteriorations, chemical deteriorations, and rebar corrosion. This review also examines the proposed nanoscale modeling of interactions between admixed nanomaterials and cement hydration products. At last, the recent progress of advanced characterization that employs techniques to characterize the properties of cement-based materials at the nanoscale is summarized.

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Section: Nanotechnology For Cbms To Overcome Physical Deteriorationsmentioning

confidence: 99%

Nanotechnology in Cement-Based Materials: A Review of Durability, Modeling, and Advanced Characterization

AlShareedah

et al. 2019

Nanomaterials

110

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“…Concrete is an inherently defective material; its F-T performance relies predominantly upon the interior structure of the material, such as its porousness, crack, pores types and size, transportation, etc. Many researchers have paid attention to the usage of nanomaterials, for example, nano-kaolinite clay [1], nano-silica [2][3][4], nano-TiO 2 [5], nanoalumina [6] and graphene nanomaterials [7][8][9][10][11][12][13][14][15][16][17][18][19][20], in the last decade. Studies have shown that the additive of these nanomaterials could improve the mechanical property and durability of cementitious materials.…”

Section: Introductionmentioning

confidence: 99%

Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

Chen

Yang

et al. 2019

Applied Sciences

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Graphene nanoplatelets (GNP) is a newly nanomaterial with extraordinary properties. This paper investigated the effect of GNP on the addition on freeze-thaw (F-T) resistance of concrete. In this experimental study, water to cement ratio remained unchanged, a control mixture without GNP materials and the addition of GNP was ranging from 0.02% to 0.4% by weight of ordinary Portland cement was prepared. Specimens were carried out by the rapid freeze-thaw test, according to the current Chinese standard. The workability, compressive strength, visual deterioration and mass loss of concrete samples were evaluated. Scanning electron microscopy also applied in order to investigate the micromorphology inside of the concrete. The results showed that GNP concrete has a finer pore structure than ordinary concrete; moreover, the workability of GNP concrete reduced, and the compressive strength of specimens was enhanced within the appropriate range of GNP addition; in addition, GNP concrete performed better than the control concrete in the durability of concrete exposed to F-T actions. Specimens with 0.05% GNP exhibited the highest compressive property after 200 F-T cycles compared with other samples. Appl. Sci. 2019, 9, 3582 2 of 12 two-dimensional (2D) Graphene Nanoplatelets (GNP), and evaluated the transport properties of concrete subjected to chloride and water environment, the results showed that GNP could enhance the resistance of concrete to chloride ion and water penetration. Mohammed et al. [15] found that GO addition could modify the microstructure and improve the compressive strength of cement matrix, and reported the GO could improve the freeze-thaw resistance of cement;however, they did not give the optimum dosage of GO. Experimental investigation showed that the addition of graphene oxide nanoplatelets (GOS) and GNP in mortar samples would increase the frost resistance of materials, and the discovered microstructure and modulus biography found that GNP and GOS could greatly refine the microstructure of mortar specimen [16]. Li et al. [17] firstly studied GO aggregates as particle size measurement and found that the aspect ratio of GO aggregates is much higher than that of the original GO nanosheets. Adding graphene and GO sheets to cement paste could improve the mechanical properties of the nanocomposite [20] but can reduce the workability of the nano cement materials [13]. Additionally, adding graphene nano-sheets (GNS) to cement paste could accelerate the hydration reaction and increase the quantity of hydration products, and could also improve chloride penetration resistance of cement paste [19]. Furthermore, adding GNP in cement would reduce the resistivity and make composites obvious pressure sensitivity [18]. Some recent research findings showed that graphene nano-sheets and their derivatives (GND) could modify cement-based materials [21]; we found that most recent attention focuses on the performance of graphene-based materials additions in cementitious materials, which can improve the better performanc...

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“…In recent years, the use of nanomaterials to enhance the mechanical properties of cementitious composites has been considered as a promising approach. [34][35][36] Several nanomaterials, including Silica, 37 titania, 38 alumina, 39 iron oxide, 40 nanoclay, 41 nano-kaolinite, 42 carbon nanotubes [43][44][45] or nanofibers, 46,47 and graphene oxide, 48 were used as modifiers to enhance the performances of cement-based materials. Although previous studies have demonstrated that the addition of nanomaterials has positive effects on the mechanical properties enhancement of cementitious composites, however, the weight fractions of the nano modifiers were ranged from 3 to 10 wt%, which largely limited their applications in civil infrastructures because of the relatively high cost of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Low dosage nano-silica modification on lightweight aggregate concrete

Zhang

Xie

Cheng

et al. 2018

Nanomaterials and Nanotechnology

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Although the nano modification has been considered as a promising approach to enhance the mechanical properties of cement-based concrete, the investigation of low dosage nano modification on lightweight cement-based concrete is still very limited. In this study, the lightweight concrete, which was modified with low dosage nano-silica particles, were investigated. Non-prewetting and prewetting methods were used to prepare the lightweight concrete samples. The compressive and flexural strengths were tested to evaluate the modification effects of low dosage nano-silica on lightweight concrete. The microstructure analyses demonstrate that the hydration process of the cement paste can be changed with addition of nanosilica, and new types of hydration products have been observed in nano modified cementitious matrix. The interface between the lightweight aggregates and the cement paste can be reinforced by low dosage of nano-silica due to the new types of hydration products. However, relatively high dosage of nano-silica will reduce the modification effect because of the internal stress, which is resulted from the volume expansion of the new types of hydration product, at the interface of the lightweight aggregates and the cement paste. This study not only shows the possibility of low dosage nano modification on the mechanical properties enhancement of lightweight concrete but also provides potential modification mechanisms, which help to design and fabricate high-performance lightweight concrete materials.

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Effects of nano-kaolinite clay on the freeze–thaw resistance of concrete

Cited by 84 publications

References 38 publications

Nanotechnology in Cement-Based Materials: A Review of Durability, Modeling, and Advanced Characterization

Nanotechnology in Cement-Based Materials: A Review of Durability, Modeling, and Advanced Characterization

Graphene Nanoplatelets Impact on Concrete in Improving Freeze-Thaw Resistance

Low dosage nano-silica modification on lightweight aggregate concrete

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